Hugh young



(No Model.)

H. YOUNG.

ART'OF SAWING STONE.

Patented June '7, 1887.

\ Y R NN W22 asses.-

' New York, have invented a ward UNITED Stains Pit-inns Gr mes HUGH YOUNG,- OF NEW YORK, N. Y.

ART OF SAWING STONE.

- SPECIFICATION forming part'oflletters' Patent lilo. 36%,459, dated June '7, 1887.

Application filed hierch ll, 1887. Serial No, 230,204. (No model.)

Tc all-207L012 it may concern:

Be it known that I, HUoH-YoUnQoi the city and county of New York, in the State of newend useful improvement inthe Art of Sawing Stone by a Reciprocating Series of Cutting-Tools, of which the following is a specification.

My invention is an improvement in the'art of sawing stonev which involves the employment of-a series of tools armed with diamonds or other hard stones and secured in fixed relation to each other in a reciprocating blade or bar which is moved in the line of the cut to be made. \Vhen the tools are maintained in Work ing-contact with the stone during their entire or equal movement in both directions,-

the debris. is simply moved by the tools backand forward in the kerf, and neither the debris nor any diamonds which may become freed from the tools have imparted to them any progressivemovement toward the'cnd of the kerf.

In my application for Letters PatenhvSerial N 0. 227,071, filed February 9, 1887, I- have described and claimed an improvement in the art of sawing stone by a reciprocating series of cutting-tools secured in'fixed relation to ment which is performed working-contact, is caused to vault. over and each other, and which consists in maintaining the tools in working-contact with the stone throughout a less length of movement in one direction than in the other, whereby each tool, during the portion of its reciprocating movewhile it is out of c'omebehind the debris formed by the previous cut. By such an operation of the series of cutting-tool's the debris and any loose diamonds which maybe in the kerf are advanced step.

by step from one .end of the stone toward the 0 other-,aud are delivered at the end of the stone, thereby keeping the kerf comparatively clear and preventing any'diamonds which may be- '1 come loose from being injured themselves or w from, injuring or tearing other diamonds from their settings.-

According to my aforesaid application, the series'of cutting-tools are lifted or maintained out of contact atone-end only of their movement-that isto say, in eachdouble movement or donblereeiprocation offthe series of tools they are caused to vault over and "come behind the debris, as above describedonl y once, and

the debris and any loose diamonds in the kerf their movement in one direction, so that the.

are advanced only one step; usnally'the dis-' series of cutting-tools will be caused to vault over and come behind the debris twice duringf each complete revolution of the. saw, thereby prodnci mg a more rapid movement of the debris toward the end of the stone at'whi'ch'it is delivered. t p

My present invention, therefore, consistsih maintaining the tools in cutting-contact with the stone during substantially the wholelength of their movement in one direction and main-- taining them out of cutting-contact during both the first and terminal portions of their-movement in the other direction, whereby, during the first'and terminal portions of their movement in one direction, the tools are caused to vault over and come behind the dbris in the kerf, in order that they may, during their movement in the other direct-ion, advance the dbris in the kerf.

' In the accompanying drawings, Figure l is 1 a sectional elevation of a machine embodying my invention. Fig. dis a diagram illustrating the line of travel of the series of cutting-tools and of each-- Fig. 2 is an end view thereof.

tool of the series; and Figs. 4, 5, and 6 are diagrams showi nga series of cutting-tools and the stone of: which they act, and which serve to illustrate my invention.

Similar letters of reference designate corre sponding parts in all the figures. i

A 'lesignates the blade, which is reeiprocated by any suitable mechanism-as, for example, by a connecting-rod, A, driven by a crank upon a shaft, B. crank 33 also forms As here represented, the a cannthc purpose of which is hereinafter described, and hasfixed in it the crank-pin b, to which the connecting-rod A is I jointed. The saw-blade A is arranged to reciprocate in guides or bearers O, which are fit tedto suitable slides or guideways, c, in a main stationary frame, i3, and the sawblade A is armed at its edge with cutting-tools c, in-which are lined diamonds, borts, or other hard stones Ice , and by the rotation of which the stone D designates the stone on which the series of reciprocating cutters 'c' act, and which is mounted upon a bed or platform, D. As the cutting progresses the saw-blade A and the stone D must be moved one relatively to the other, in order to advance or feed the saw to the stone; and in this example of my invention the feeding operation is effected by raising the platform or bed D. Any suitable mechanism and forward always in the same plane, and the cutting-tools 0' would be maintained in cutting-contact wit-h the stone throughout the entire length of movement in both directions.

a This, however, would result in the dbris simmonds,

ply being moved back and forth in the kerf,. entailing useless wear or destruction of the diaand in any lost diamonds being moved similarly back and forth to their own detriment and the possible breaking or tearing of the other diamonds from the tools inwhich they are set. To prevent this, I'se'parate the series ofcutting-tools and the stones from working-contact at each end of the reciprocating movement and cause the series of cutting-tools when performing bot-h the first and terminal portions of their movement in one direction to be maintained out of cutting-contact with the stone, so that each of the cutting-tools will be caused to vault over and. come behind the debris produced by the previous cut.

In Fig. 3-I have illustrated by asimple diagram the line of movement in which the series of cutting-tools,and in which each of said tools, operates, and I have shown by arrows the direction of such movement. While the series of cutting-tools are moving in the direction of the arrows s in Fig. 3, they are maintained in cutting-contact -with' t-he stone throughout substantiallyafieentire length of their movement; but during the movement of the cutting-tools 'in the direction of the arrows 8 they are maintained for a portion of the time out of contact with the stone, and this separation of the cutting-tools and stone in this example of my invention is produced by slight-1y lifting the blade A, as I shall soon describe. As the series of cutting-tools a about complete their movement in the direction of the arrows .s,they

are lifted from the stone, and during the first portion of their movement in the direction of the arrows a,and while they are moving from s to a, the series of cutting-tools are maintained out of contact with the stone, and are caused to vault over and come behind the debris left in the kerf at the previous cut. During the middle portion; of the movement of the series of cutting-tools in the direction indicated by the arrows a, and while they are moving from the point 8 tea, the toolsare maintained in cutting-contact with the stone; but at the point 8 the contact between the tools and the stone is again broken, in this instance also by lifting the blade A, and the series of tools are maintained out of cutting-contact with the stone while they perform the terminal portion of their movement in the direction of the arrows s, which is while they are moving from the oint a to a. At the point 8 the direction of movement of the series of cutting-tools is reversed again, and they are brought into con- -movement in the direction indicated by the arrows a in Fig. 3.

I have here shown, for purposes of illustra' tion, one simple form of mechanism, which may be employed for producing thelift of the .blade A at the points-a and a on the diagram shown in Fig. 3. Theblade bearers orguides C. may rise and fall slightly in the guideways e, and are hung from links e, which are in turn and having upwardly-projecting arms connected by a rod, e. One of the bell-crank levers'E has its horizontally-extending arm prolonged, as shown at E, and provided with a truck-roll, e, which bears upon the periphery of the cam B. "This cam has projections b b". The projection b produces the lift of the blade while moving from a to 8" in the direction of the arrowss, and the projection b produces the lift of the blade while moving from s to s" in the direction of the arrows s. The crank and cam B rotate. in the direction of the arrows shown thereon in Fig. 1', andin the posiing in the direction indicated by the arrowss, Fig. 3, and each of the several cutters or cutting-tools c has nearly reached the position in the length of its movement indicated by s in Fig. 3. As soon as the projection bstrikcs the truck-roller e, which it will do at the point -s, the mechanism operated upon by the cam will be actuated so as to lift the blade A and to maintain itlifted while the crank-pin moves to by dotted lines in Fig. 1, which brings the the series of cutting-tools and each one of said tools to the position shown at s. The concen' j'ection' I), theblade is allowed to de'send slightly, bringing the cutti ng-toolsagain into contact, where they are maintained during substantially the entire length of movementof the cutting-tools in the direction of the arrows a. As the blade completes its movement in the direction of the arrows 8, the projection b on the cam comes to the truck-roller maintain the cutting-tools out of contact with the stone while they are moved from sto s.

In the diagram, Fig. 4, I have represented the position of the cuttingtools c relatively to the stone D just as they complete their movement in the direction of the-arrows s, and as they are. about to reach the point a" and be lifted, audit will be-observed that a tact with the stone preparatory to making their hung from bell-crank levers E, fulcrumed at c,

tric portion of the cam B, just behind the prothen reaches the truck-roller e, and r tion of parts shown in'Fig. 1 the blade is movits dead-center, or to the position represented .125 c, and the blade is lifted to diamond, o, has become detached from the cutting-tool e'Lat the left-hand end of the se- I arrow 8' from s to s of Fig. 3-and it will be seen that during this first portion of their movement in the direction of the arrow 8' the left-hand cuttingtool 0' will be caused to pass to theleft over the diamond 0, and in the same manner each of the cutting-tools will vault overand come behind the debris formed by the previous cut.

In the diagram in Fig. 6 I have represented the position of the blade after it has com pleted its movement in the direction of the arrows s and is commencing its movement in the direction of the arrows s, and it will be understood that in the terminal portion of their movement in the direction of the arrows s, and while moving fronht to s, the next to the last cutting-tool c at the left-hand end of the series will have vaulted over and come behind the loose diamond o, and in a like manner each of the cutting-tools will have vaulted over and come behind the debris formed by their operation in the direction of the arrows s.

From theabove description itwill be understood that twice during each complete revolution or double movement of the series of cutting-tools theywili be caused to vault over and come behind the debris in the kerf, and at each double stroke or revolution the debris will be advanced in the direction of the arrows fin Figs. 4, 5, and 6, and will be finally delivered at the end of the stone. I do not claim herein the improvement in pending application, Serial No. 227,071,-fi1ed'- theart of sawing stone by a reciprocating se- 40 ries of cntting-tools arranged in fixed relation to each other, consisting in maintaining the tools in workingcontact'with the stone through out a less length of movement in one direction than in the other, whereby each tool, during the portion of its reciprocating movement which is'perl'ormed' while out of contact, is caused to vanlt'over and come behind the debris formed by the previous cut; nor do'I claim such improvement when the difference in the lengthofworking-contactissubstantiallyequal to the distance between two tools in. a, series, as such improvement forms the subject of my February 9, 1887. y

What I claim as my invention, and desire to secureby Letters Patent, is-v- I The improvement in the art of sawing stone by a reciprocating seriesof cutting-tools ar-. ranged in fixed relation to'each other, con sisting in maintaining the tools in-cntting-con5 tact with the stone during substantially the whole length of their movement in one direction, and maintaining them 'out of cutting-contact during both the first-and terminal portions of their movement'in' theoother direction, whereby, during the first and terminal I .portions of their movement in one direction, the tools are caused to vault-over and come behind the debris in the kerf, in order that they may, during their movement in the other direction,- advance the debris inthe kerf, substantial] y as herein described.

HUGH YOUNG.

Witnesses:

O. HALL, FEEDK. HAYNES. 

